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Applications of extreme-value theory in corrosion engineering

by: Scarf, P.A.; Laycock, P.J.

Publisher: National Institute of Standards and Technology

Collection: NISTJournalofResearch; NISTresearchlibrary; fedlink; americana

Contributor: NIST Research Library

Language: English

Rights: The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder.

Volume: 99

Journal of Research of the National Institute of Standards and Technology

Notes

No title page found. No copyright page found. No table-of-contents pages found.

Abstract: In the context of corrosion engineering it is often natural to be concerned with extreme events. This is because, firstly, it is these extreme events that often lead to failure and, secondly, it may only be possible to measure the extremes, with much of the underlying measurements by their very nature unobservable. Statistical methods relating to extreme value theory can be used to model and predict the statistical behaviour of extremes such as the largest pit, thinnest wall, maximum penetration or similar assessment of a corrosion phenomenon. These techniques can be applied to the single largest value, or to a given number of the largest values, measured over individual areas or coupons; or to all values exceeding a given threshold. The data can be modeled to account for dependence on environmental conditions, surface area examined, and the duration of exposure or of experimentation. The application of a selection of these techniques is demonstrated on data from industry and from laboratory experiments.